The Legend of Zelda: The Wind Waker - Rat

Rats (on the right in the picture) are sneaky little enemies that pop out from a hole in the wall and run into Link. When they do this, they damage him, as well as make him drop some Rupees. If he isn't quick enough, the Rats will come and steal the Rupees. An easy way to remove the problem of Rats is by putting some All-Purpose Bait in front of the hole, which causes them to become friendly, giving you the opportunity to buy some goods from it.